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以芥酸含量为０．４４％、不育率为５１．９％、纯度为９９．７％的１１７Ａ二级原原种为材料，在同一隔繁点进行连续多代自然隔繁，结果表明，仅自然隔繁一代的１１７Ａ种子能达到１１７Ａ制种用原种所规定的芥酸＜１．０％、不育率≥４７．０％、纯度≥９９．０％、植株性状整齐度高、一致性好的质量标准，二代及以后各代均达不到规定的指标，且代数愈高差距愈远。说明隐性核不育两型系不能以制种用的原种连续进行繁殖供大面积制种用，否则，将明显增加拔可育株工作量，降低制种产量、杂交种的优势和品质
The results showed that 117A second-level original seed with erucic acid content of 0.44%, sterility of 51.9% and purity of 99.7% , 117A seeds can only achieve 117A seed production of 117A seeds with erucic acid <1.0%, infertility rate ≥47.0%, purity ≥99.0%, high plant uniformity, Consistency of good quality standards, the second generation and subsequent generations are less than the required indicators, and the higher the algebra the farther away. The results indicated that recessive genic male sterility type two lines could not be continuously propagated for large-scale seed production with original seed for seed production. Otherwise, the workload of pull-fertile plants would be significantly increased, the yield of hybrid seed production reduced, the advantages and quality of hybrids